Geoffrion, 25, sustained a depressed skull fracture Nov. 9, 2012 while playing for the Hamilton Bulldogs, Montreal's AHL affiliate, in a game at Bell Centre against the Syracuse Crunch.
"After suffering an injury in November and taking time to recover and reflect, I have decided to step away from the game of hockey for the time being," Geoffrion said in a statement released by the Canadiens. "I would like to thank [owner] Geoff Molson, [general manager] Marc Bergevin, the entire Montreal Canadiens organization as well as the Hamilton Bulldogs organization for everything they have done for me. They have been unwavering in their support, professionalism and kindness. I cannot thank them enough."